Why strong passwords matter
Billions of account credentials have been exposed in data breaches over recent years. Attackers use those lists along with automated tools that attempt millions of logins per hour. Passwords like “password123” or “qwerty” are cracked in seconds — they appear at the top of every leaked database.
Attackers do not start by trying every possible combination. They start with the most commonly used passwords, then add personal information gathered from social media: birthdays, names, and pet names. A password that means something to you is a password that is easier to guess.
Length is what matters most
The single biggest factor in password strength is length, not special characters. A 12-character password is not a few times stronger than an 8-character one — it is exponentially harder to break.
This tool shows an entropy figure as you adjust the settings. Entropy measures unpredictability: the higher the number, the harder the password is to guess by brute force. For most accounts, 80 bits of entropy is solid. For email or banking, aim for 100 bits or more. A 16-character password mixing uppercase, lowercase, and digits easily clears that bar.
How the randomness works
Most everyday random numbers follow patterns that a determined attacker can predict given enough data. This tool uses the browser’s cryptographic random number generator, which draws from hardware-level noise in your device — truly unpredictable, the same source used by password managers and encryption software.
Generated passwords are never sent anywhere. Everything happens inside your browser and disappears when you close the tab.
Recommended settings
For important accounts: 16 characters or longer, mixing uppercase, lowercase, and digits. Some older websites reject special characters in passwords; if that happens, remove them and increase the length instead.
For a numeric PIN, select digits only and set the length you need.
How to use this tool
Use the slider to set the length, check the character types you want, and click Generate Password. If you want a different result, Regenerate creates a new one immediately. Copy saves it to your clipboard.
Frequently asked questions
Where should I store the generated password? Use a password manager — Bitwarden, 1Password, or the one built into your browser or phone. It stores passwords securely and fills them in automatically.
Can I reuse a password across multiple sites? No. If one site is breached and that password is exposed, attackers immediately try it on every other site you might use. This technique — credential stuffing — is responsible for a large share of account takeovers.
Should I also set up two-factor authentication? Yes, whenever a site offers it. Even if a password leaks, 2FA stops an attacker from completing the login. An authenticator app is more secure than SMS codes.